答案:B
解析:
Choice B is correct. In 1991, t=0 and the equation gives f(0)=51.35. In 2012, t=21 and the equation gives f(21)=523.05. Therefore the population has increased by a factor of approximately 10 after 21 years.
您現在的位置: 首頁 > SAT > SAT每日一題 > 正文
答案:B
解析:
Choice B is correct. In 1991, t=0 and the equation gives f(0)=51.35. In 2012, t=21 and the equation gives f(21)=523.05. Therefore the population has increased by a factor of approximately 10 after 21 years.
重點單詞 | 查看全部解釋 | |||
equation | [i'kweiʃən] |
想一想再看 n. 相等,方程(式), 等式,均衡 |
聯想記憶 | |
population | [.pɔpju'leiʃən] |
想一想再看 n. 人口 ,(全體)居民,人數 |
聯想記憶 | |
ferret | ['ferit] |
想一想再看 n. 白鼬,雪貂,偵探 v. 用雪貂打獵,搜出,驅出 |
||
approximately | [ə'prɔksimitli] |
想一想再看 adv. 近似地,大約 |
||
function | ['fʌŋkʃən] |
想一想再看 n. 功能,函數,職務,重大聚會 |
||
current | ['kʌrənt] |
想一想再看 n. (水、氣、電)流,趨勢 |
聯想記憶 | |
extinct | [iks'tiŋkt] |
想一想再看 adj. 滅絕的,熄滅的,耗盡的 |
聯想記憶 | |
species | ['spi:ʃiz] |
想一想再看 n. (單復同)物種,種類 |
||
factor | ['fæktə] |
想一想再看 n. 因素,因子 |
聯想記憶 |